Method of making profiled work of aluminum or aluminum alloy by extruding process

Abstract From the Canadian patent

The method of making a profiled work of aluminum or aluminum alloy comprises the steps of loading a billet of aluminum or aluminum alloy in a container having an extruding die at its one end and urging the billet against the extruding die by a ram so as to extrude the billet through the die to form a profiled work of aluminum or aluminum alloy with its cross-section conforming with that of the die. A disc of aluminum or aluminum base alloy containing at least one or two elements selected from the group consisting of elements B, Be, Ti Zr, W, Mo and V is located, between the extruding die and the billet before the billet is extruded. The element contained in the disc forms very hard and fine …